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首页> 外文会议>International Conference on Advances in Building Technology Vol.2, Dec 4-6, 2002, Hong Kong, China >PARAMETER OPTIMIZATION OF MULTI-TMDS FOR WIND- EXCITED VIBRATION SUPPRESSION OF TALL BUILDINGS
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PARAMETER OPTIMIZATION OF MULTI-TMDS FOR WIND- EXCITED VIBRATION SUPPRESSION OF TALL BUILDINGS

机译：高层建筑风振抑制的多TMDS参数优化

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摘要

Owing to shortage in the supply of land in Hong Kong, buildings in the urban areas of Hong Kong are often built to be tall and slender. Mitigation of wind-induced vibration by using supplemental damping devices has been required in design of some slender tall buildings to satisfy stringent criteria resulting from Hong Kong's typhoon wind climate. Tuned mass/liquid dampers (TMDs/TLDs) provide a cost-effective means for this purpose. This paper describes a study on optimizing the parameters of multiple tuned mass dampers (multi-TMDs) for wind-excited vibration suppression of high-rise buildings. Based on three-dimensional finite element model for design analysis of tall buildings, a reduced-order lumped mass MDOF model with the same modal properties as original model is developed for multi-TMDs design. By dividing the building-damper system as two sub-structures, transfer functions of the building with multi-TMDs attached at arbitrary stories are explicitly derived, and random vibration response of the building-damper system is accurately expressed by adopting appropriate wind force spectrum and accounting for spatial correlation of the excitation. With these analytically derived formulations, the genetic algorithm is then applied to search optimal parameters of the multi-TMDs that achieve maximum response suppression for the building. The damper parameters concerned include the stiffness, mass and damping. A case study of an actual 50-story tall building using multi-TMDs for wind-excited response mitigation is given as an example.
机译：由于香港土地供应短缺，香港市区的建筑物通常建得高而纤细。在一些细长的高层建筑的设计中，需要使用辅助阻尼装置来减轻风引起的振动，从而满足由香港的台风影响而制定的严格标准。调谐的质量/液体阻尼器（TMD / TLD）为此目的提供了一种经济高效的方法。本文介绍了一种用于优化高层建筑风激励振动抑制的多重调谐质量阻尼器（multi-tuned mass阻尼器，multi-TMD）参数的研究。基于用于高层建筑设计分析的三维有限元模型，为多TMD设计开发了具有与原始模型相同的模态特性的降阶集总质量MDOF模型。通过将建筑物阻尼器系统划分为两个子结构，可明确推导在任意楼层附加有多个TMD的建筑物的传递函数，并通过采用适当的风谱和风速，精确地表达建筑物阻尼器系统的随机振动响应。考虑到激发的空间相关性。利用这些分析得出的公式，然后将遗传算法应用于搜索实现建筑物最大响应抑制的多TMD的最佳参数。有关的阻尼器参数包括刚度，质量和阻尼。以使用多TMD减轻风激励响应的实际50层高层建筑为例。

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